1. Department of Otolaryngology Head and Neck Surgery, University of Washington, Seattle, Washington
2. Department of Biostatistics, School of Public Health, University of Washington, Seattle, Washington
3. Department of Otolaryngology Head and Neck Surgery, Rutgers New Jersey Medical School, Newark, New Jersey
4. NY Center for Voice and Swallowing Disorders, New York, New York
5. Division of Clinical Pharmacology, Department of Medicine, Vanderbilt Medical Center, Nashville, Tennessee
6. Surgery Service, Department of Veterans Affairs Medical Center, Seattle, Washington